Drought detection in the Murray-Darling basin from space gravity and hydrologic observations
Leblanc, M., Ramillien, G., Tregoning, P., and Tweed, S. (2008) Drought detection in the Murray-Darling basin from space gravity and hydrologic observations. Geophysical Research Abstracts. European Geosciences Union: General Assembly 2008 , 13 – 18 April 2008, Vienna, Austria , p. 1.
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GRACE geoid data were used to monitor and analyse the severe multi-year drought of Murray-Darling river basin in Australia for the recent period (08/2002-07/2007). The GRGS/CNES 10-day solutions up to degree 50 (i.e., spatial resolution of ˜400 km) were used to estimate time-series (and associated uncertainties) of water volume change over this˜1 millions of km2 region and revealed a significant decrease of water mass versus time of˜100 cubic km. Annual averages of GRACE-derived water storage were compared to in-situ observations of surface waters and showed a correlation of 98%. In this semi-arid region of Australia, groundwater represents the larger part of the total water loss (70%) during the drought, thus showing the capability of GRACE to detect and monitor variations of shallow groundwater.
|Item Type:||Conference Item (Abstract / Summary)|
|FoR Codes:||04 EARTH SCIENCES > 0406 Physical Geography and Environmental Geoscience > 040608 Surfacewater Hydrology @ 50%|
04 EARTH SCIENCES > 0406 Physical Geography and Environmental Geoscience > 040603 Hydrogeology @ 50%
|SEO Codes:||96 ENVIRONMENT > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified @ 100%|
|Deposited On:||04 Sep 2009 17:08|
|Last Modified:||13 Feb 2011 05:13|
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